Error if ImageField or FileField is optional

[I Komang Suryadana]

I think on the function get_file_detail must be checking file is None when class name ImageField or FileField.

If you can implement my code as below.

@register.simple_tag
def get_file_detail(adminform, field):
    field_data = adminform.form.initial[field]
    field_name = type(field_data).__name__
    try:
       if field_name == 'ImageFieldFile':
            if not bool(field_data):
                return {'type': 'image', 'width': 0, 'height': 0, 'url': '', 'size': 0, 'extension': ''}
            filename, file_extension = os.path.splitext(field_data.url)
            return {'type': 'image', 'width': field_data.width, 'height': field_data.height, 'url': field_data.url, 'size': field_data.size, 'extension': file_extension}
       if field_name == 'FieldFile':
           if not bool(field_data):
               return {'type': 'file', 'url': '', 'size': 0, 'extension': ''}
           filename, file_extension = os.path.splitext(field_data.url)
           return {'type': 'file', 'url': field_data.url, 'size': field_data.size, 'extension': file_extension}
       return field
    except IOError:
        pass

Thank You.